i just answered one of these i believe the answer is continuous.
Answer:

Step-by-step explanation:
in the equation given these are the values:
a=1 b= -5 c= -7
if we plug this in the quadratic formula 
this is simplified to 
hope this helped
Think about it this way, that for every 5/6 pound bag you are losing 1/6 and 1/6*12=2 therefore the answer is 12
Answer:
I don't realy know
Step-by-step explanation:
I think it's B
i am pretty sure it is 0.6